Kalpa.Cloud is a toolkit for developing SaaS applications. It consists of a Universal Cross-platform Client and a Qt-based library. It allows the developer to develop Rich Internet Applications with GUI using the Qt programming style for the server and to implement it as easily as possible.

jQuery Tools is a UI library designed for the particular needs of Web sites. It provides tabs, tooltips, accordions, overlays, smooth navigation, and visual effects. This library contains six of the most useful JavaScript tools available for modern Web sites. All of these tools can be used together, extended, configured, and styled. This enables the possibility of hundreds of different widgets and new personal ways of using the library.

QTermWidget is a Qt4 widget that provides terminal emulation for embedding in other applications. It is based on the KDE4 Konsole code, but was rewritten entirely to depend on Qt only. Python bindings also exist.